ARM: mv78xx0: un-deprecate Terastation WXL

This board is still being worked on by the Debian-on-Buffalo
project, so let's leave it in the tree for now.

Link: https://github.com/1000001101000/Debian_on_Buffalo
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Gregory Clement <gregory.clement@bootlin.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/mv78xx0_defconfig

@@ -17,7 +17,6 @@ CONFIG_MACH_TERASTATION_WXL=y
 CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_FPE_NWFPE=y
-CONFIG_UNUSED_BOARD_FILES=y
 CONFIG_VFP=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y

arch/arm/mach-mv78xx0/Kconfig

@@ -3,7 +3,7 @@ menuconfig ARCH_MV78XX0
 	bool "Marvell MV78xx0"
 	depends on ARCH_MULTI_V5
 	depends on CPU_LITTLE_ENDIAN
-	depends on ATAGS && UNUSED_BOARD_FILES
+	depends on ATAGS
 	select CPU_FEROCEON
 	select GPIOLIB
 	select MVEBU_MBUS
@@ -17,12 +17,14 @@ if ARCH_MV78XX0
 
 config MACH_DB78X00_BP
 	bool "Marvell DB-78x00-BP Development Board"
+	depends on UNUSED_BOARD_FILES
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell DB-78x00-BP Development Board.
 
 config MACH_RD78X00_MASA
 	bool "Marvell RD-78x00-mASA Reference Design"
+	depends on UNUSED_BOARD_FILES
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Marvell RD-78x00-mASA Reference Design.